Gets the value of the IsInDesignMode attached property for the specified UIElement.
'Usage Dim element As DependencyObject Dim returnValue As Boolean returnValue = DesignerProperties.GetIsInDesignMode(element) 'Declaration Public Shared Function GetIsInDesignMode ( _ element As DependencyObject _ ) As Boolean
element is nullNothingnullptra null reference (Nothing in Visual Basic).
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.